Safety device for elevators



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- UNITED NSTATES PATENT OFFICE.

WELLINGTON P. KIDDER, OF BOSTON, MASSACHUSETTS.

SAFETY DEVlCvE FOR ELEVATORS'.

SPECIFICATION forming part of Letters Patent No. 514,123, dated February6, 1894.

Application filed May 15, 1893- Serial No. 474,327. (No model.) l

To all whom t may concern:

Be it known that I, WELLINGTON P. KID-DER, a citizen of the UnitedStates of America, residing at Boston,in the county of Suffolk and Stateof Massachusetts, have invented certain vnew and useful Improvements inSafety Dewith the appended drawings and thendefinitely claimed at theend hereof.

In the accompanying drawings-Figure 1 is a front view of the gates of afreight elevator with the gates closed. Fig. 2 is a similar View withthe gates open. Fig. 3 is a horizontal section on the line sono of Fig.l. Fig. ,l is a similar section on the line y y 'of Fig. 2. Fig. 5 is aside view of the locking device. Fig. 6 is a front View of amodification with the gates closed. Fig. 7 is asimilar view of the samedevice with the gates open. Fig. 8 is a plan of the same. Fig. 9 is aside View of the same.

Referring now to the details of the drawings by letter, and moreparticularly to Figs. l to 5, A represents the well gate, which I preferto make in two sections as shown, con' neoted by ropes B passing overpulleys C C so that one section' counterbalances the otherthe lower onesinking down even with or just below the level of the floor, as shown inFig. 2. At the side are bolted two brackets D, supporting two rods E, onwhich slides a block F, which is made fast in anysuitable manner to thecompanion or valve controlling rope G, which I prefer to call acontroller. On

these brackets D, is pivoted at d, a peculiarly shaped bar or fastenerH, provided with a recess or bend h, whose shape is clearly shown atFig. 5, which bar, being pivoted as described and shown, is capable ofswinging sidewise, so as to assume either the position indicated byFigs. l and 3, or that shown in Figs. 2 and 4. y

Each section of the gate is provided with a short 'bar J, which projectsinto the path of the bend or recess h, as the bar H swings on the pivotscl. p

The operation is as follows: Supposing the sections of the gate to beopen as shown in Fig. 2, the block F on the rope will be in the recess hand so the rope or controller cannot be moved sufficiently to start thecar, and any attempt to move the bar H will be prevented by the body ofsaid bar H coming in contact with the bars J, so that the car cannotpossibly be started while the sections of the gate are in the positionshown in Figs. 2

and 4. If now the sections of the gate are closed so as to bring thebars J opposite the recess h, the bar H may readily be swung over thebars J, which will thus securely fasten the gate and at the same timeswing away from the block F, thus leaving the rope free to move andstart the car as soon as the gate is closed and fastened. When the ropeor controller has been moved to start the car, the block F assumeseither the position indicated by full lines in Fig. 1 or that in dottedlines in the same ligure, according to the direction the car is moving,and when in either of these positions as it abuts against the body ofthev bar H, the latter cannot be moved, and so the sections of the gateare held fast until the car is again made stationary, when the block'Fis again opposite the recess h (as in Fig. 2) when the sections of thegate can be readily opened.

In the modifications shown in Figs. 6 and 7, there is an elbow lever Kpivoted to each bracketrD,jand the two levers are connected together bya rod L, so as to move simultaneously. Pivotally connected to theopposite ends of the levers is a bar H having a recess h for the samepurpose as the recess h in the bar H. lt is obvious that as the bar Hmoves with the elbow leversK said bar will move sidewise and over thebars J or block F in substan tially the same manner as the bar H inFigs. l to 5. In either of these forms of'my invention, the gate may bemade in two sections or in one, as preferred.

I do not intend to limit myself to the de- IOC) vices herein shown, asother modifications may be adopted Without departing from the spirit ofmy invention. y

1. The combination in an elevator and with the car and the controllerthereof, the latter having a projection fast thereon, of a laterallymoving bar disconnected from the car and engaging with such projection,and a vercally-movable gate arranged to hold the bar in engagement withthe projection on the controller when said gate is open, substantiallyas described. A

2. The combination in an elevator and with the car andvertically-movable well-gate thereof, of a laterally moving bar,disconnected from the car and engaging with the gate,and a controllerprovided with a projection arranged to hold the bar in engagement withthe Well-gate when the car is in motion, sub stantially as described.

8. The combination in an elevator and with the car and the controller,the latter having a projection thereon, of a laterally-movable baradapted to engage with the projection on the gate when said gate isclosed, and with the projection on the controller when the gate is open,substantially as described.

4.-. The combination in an elevator and with the car, the controller,and the Well-gate thereof, of a bar J mounted on the gate, a block Fmounted on the rope, and a laterally moving bar engaging with the blockF When the gate is open and with the bar J when the gate is closed,substantially as described.

5. The combination in an elevator and with the car, the valve operatingdevice and the Well-gate thereof, of a bar J mounted on the gate,a blockF mounted on the rope, and avi brating pivoted bar I-I having a recess hconstructed and arranged to pass over and hold the block F when the gateis open, and the bar J when the gate is closed, substantially asdescribed.

6. The combination in an'elevator and with the well,the car, theoperating apparatus,the double gate A and the rope for setting theoperating apparatus in motion, of a block F attached to said rope, thebars J on the sections of the gate, and the pivoted barH having therecess h arranged to pass over and hold the bar J when the gate isclosed and the block F when the gate is open, substantially asdescribed.

7. The combination in an elevator and with the well, the car, the valveoperating device and the Well gate, of the brackets D, the rods Esupported by said brackets, the block F sliding on said rods andattached to the valve operating device, a bar J on said well gate, andthe bar H having a recess h and pivoted on the brackets D, andcooperating with the bar J and block F, substantially as described andfor the purpose set forth.

In testimony whereof I aiix my signature, in presence of two witnesses,this 12th day of May, 1893.

WELLINGTON P. KIDDER.

Witnesses:

EDWARD S. BEACH, F. L. GooDHUE.

